Hitwise Releases Competitive Intelligence for Online Retailers
Internet research firm Hitwise launched its US Retail Datacenter which offers a variety of data and trends for ecommerce from over 20,000 online stores across 21 categories:

US Retail Index Top 10 Retail Websites (Appliance and Electronics)

Top 10 Retail Search Terms (Appliance and Electronics)

Top Fast Moving Retail Websites

Appliances and Electronics Analyst Blog Posts - Retail

Top Fast Moving Retail Websites
Hitwise also reports for the following markets:
United Kingdom
Australia
New Zealand
Singapore
Hong Kong
You can subscribe to any or all of these updates through RSS subscription. If you are not familiar with the concept of RSS, using an RSS reader such as Google Reader, you can access all the updates from Hitwise (or any other site you subscribe to through your reader, like Get Elastic) without having to visit the website each time to check for updates. Hitwise has instructions for you here.

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Nice find Linda, hopefully they expand and update their data often, at least each quarter.
Hi Matt, the data will be updated weekly…hopefully the blog will be updated often too as it does look a little sparse.